CN1050291A - Static random memory electric ity losing protective socket - Google Patents
Static random memory electric ity losing protective socket Download PDFInfo
- Publication number
- CN1050291A CN1050291A CN 90108105 CN90108105A CN1050291A CN 1050291 A CN1050291 A CN 1050291A CN 90108105 CN90108105 CN 90108105 CN 90108105 A CN90108105 A CN 90108105A CN 1050291 A CN1050291 A CN 1050291A
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- ram
- static random
- socket
- circuit
- random memory
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Abstract
Static random memory power-off protection socket is an adapter of the memory on the electronic computer, cooperates static random memory to use, and can preserve the information of being stored under powering-off state.Its circuit places socket, with circuit modular.Lithium battery in its circuit is through diode D
2, resistance R
3Also connect the power end of RAM, the CS end of RAM is through resistance R
1Connect the power end of RAM, the output of external circuit decoder is coupled to the CS end of RAM through capacitor C.This socket is not changed the primary circuit of RAM, just can cut off the power supply, and off line keeps information.
Description
The present invention relates to the electronic computer static storage.
In the environment of Industry Control, line voltage is unsettled, and overloading, short circuit phenomenon are arranged, and line voltage is descended and tripping operation, causes instantaneous power-down, computer system is produced disturb, and causes the control unit misoperation, perhaps loses on-site operational data.Even at more stable machine room, power down suddenly is also unavoidable, feasible just debugging routine on development system, and moment comes to naught.Power down protection has become various single board computers, scm application system and development system problem anxious to be solved.
A kind of but the power down that do not make any changes keeps the static CMOS random memory electric ity losing protective socket that the information off line keeps information, line moduleization to original system but the present invention provides to the public.
Task of the present invention is achieved in that the power down protection circuit is installed in the plastic module, existing 24 pin of module or 28 pin.During use, static CMOS RAM A is inserted on this socket B, again this socket is inserted on the former RAM socket C.
The structure of circuit is: the main power source of 5V is through diode D
1Join with the power end of RAM, the lithium battery of back-up source+3V that is used to protect usefulness in this socket is through diode D
2, resistance R
3Also be connected to the power end of RAM.For guaranteeing not change the RAM internal information during the power down, RAM CS holds through resistance R
1Be connected to the power end of RAM, the output of external circuit decoder is coupled to the CS end of RAM through capacitor C.Like this, in the moment of energized or deenergization, no matter decoder output is in high level or low level, can not influence the level of the CS end of RAM, is not rewritten with the information that guarantees RAM.Resistance R
2Be connected on decoder output and main power source+5V end, so that make decoder energy operate as normal.
Advantage of the present invention is: do not change original circuit of RAM, add that this socket just can power down keep information, but also off line keeps information.With circuit modular, simplified design, highly versatile.
Description of drawings:
Fig. 1 modular jack schematic diagram
The circuit diagram of Fig. 2 power down protection
Fig. 3 static random memory electric ity losing protective socket cooperates figure
Claims (2)
1, static random storage electricity-losing protective socket is used for the information storage of electronic computer class, it is characterized in that, the power down protection circuit is installed in the socket jack moduleization, generalization.
2, static random storage electricity-losing protective socket according to claim 1 is characterized in that, the output of external circuit decoder is through being capacitively coupled to the CS end of RAM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108105 CN1050291A (en) | 1990-09-28 | 1990-09-28 | Static random memory electric ity losing protective socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108105 CN1050291A (en) | 1990-09-28 | 1990-09-28 | Static random memory electric ity losing protective socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1050291A true CN1050291A (en) | 1991-03-27 |
Family
ID=4880851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90108105 Pending CN1050291A (en) | 1990-09-28 | 1990-09-28 | Static random memory electric ity losing protective socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1050291A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103763110A (en) * | 2014-01-03 | 2014-04-30 | 熊猫电子集团有限公司 | Parameter clearing device for communication equipment |
-
1990
- 1990-09-28 CN CN 90108105 patent/CN1050291A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103763110A (en) * | 2014-01-03 | 2014-04-30 | 熊猫电子集团有限公司 | Parameter clearing device for communication equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |